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unit of measure: the base unit | the supplementary unit | the derived unit

*geometry: the area of a flat figure | the area of a solid | the volume of the solid*

A ** rectangular parallelipipedon** is a polyhedron that has six faces in form of rectangles (or squares), two by two being similar.

The ** area of a rectangular parallelipipedon** is equal to the doubled sum of the surfaces that have common apex.

where:

a, b, c — the sides of a rectangular parallelipipedon.

*For separation of number integers and decimals, use the symbol – point [.]*

context information: contemporary and archaic unit of measurement of area